package demo0527;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.Scanner;

public class UpdateDemo {
    private static final String URL="jdbc:mysql://localhost:3306/userdb";
    private static final String DB_USERNAME="root";
    private static final String DB_PASSWORD="123456";
    public static void main (String[]args) throws ClassCastException, SQLException, ClassNotFoundException {
        Class.forName("com.mysql.cj.jdbc.Driver");
        Connection connection= DriverManager.getConnection(URL,DB_USERNAME,DB_PASSWORD);
        String sql ="delete from userdb where id=?";
        PreparedStatement preparedStatement= connection.prepareStatement(sql);
        Scanner scanner=new Scanner(System.in);
        System.out.println("输入ID");
        int id = scanner.nextInt();

        preparedStatement.setInt(1,id);

        int i=preparedStatement.executeUpdate();
        if(i>0){
            System.out.println("删除成功");
        }
        else {
            System.out.println("删除失败");
        }
    }
}